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Finding the Fourth Proportional to 951.75, 1,312.94 and 615.53

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Solution

The fourth proportional to 951.75, 1,312.94 and 615.53 is: 849.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.75 : 1,312.94 = 615.53 : x
  2. Step 2: Convert to fraction form
    951.75/1,312.94 = 615.53/x
  3. Step 3: Cross multiply
    951.75x = 1,312.94 × 615.53
  4. Step 4: Simplify right side
    951.75x = 808,158.78
  5. Step 5: Solve for x
    x = 808,158.78/951.75
  6. Step 6: Final answer
    x = 849.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.